diff --git a/FFMpegCore/FFMpeg/FFMpeg.cs b/FFMpegCore/FFMpeg/FFMpeg.cs
index d227a2e..4e7d47a 100644
--- a/FFMpegCore/FFMpeg/FFMpeg.cs
+++ b/FFMpegCore/FFMpeg/FFMpeg.cs
@@ -247,7 +247,10 @@ public static bool Convert(
         public static bool PosterWithAudio(string image, string audio, string output)
         {
             FFMpegHelper.ExtensionExceptionCheck(output, FileExtension.Mp4);
-            FFMpegHelper.ConversionSizeExceptionCheck(Image.FromFile(image));
+            using (var imageFile = Image.FromFile(image))
+            {
+                FFMpegHelper.ConversionSizeExceptionCheck(imageFile);
+            }
 
             return FFMpegArguments
                 .FromFileInput(image, false, options => options